Suction-operated valve mechanism.



A. KILBORN.

SUCTON OPERATBD VALVE MBCHANSM. APPLIOATION FILED 00122, 1908.

985,521 y Patented Sept. 28, 1909.

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ihneescs A. KILBORN. SUCTION OPBRATED VALVE MEGHANISM.

APPLICATION FILED 0012, 190s.

935 521 Patented Sept28, 1909. zsHBBTs-SHBBT 2.

j l Il', 7 7' @ii Lik @www inder, while the cylinder 2 contains a double ALBERT KILBORN, 0F .MUEBLE BRIGHTON, VICTDRI, AUSTMLI.

SUCTIQN- OPERATE VIJVE MECEANSHE.

' Specicetor. of Letters Patent. Application tiled. october 2, M03.

Patented Sept.' 28, 1909. serial no. 455,911.

To all whom it may concern:

Be itknown that l', ALBERT Kinsman, a subject of the King of Great Britain, resid` ing at Bondi, New street, Middle Brigln ton, inthe State of Victoria, Commonwealth ot Australia, engineer, have invented a Suction-0pcratcd Valve ivlechanism, of which the 'following is a specilication.

This invention consists of mechanism, operated by suction, which is designed for the purpose of oscillating or reciprocating a valve, adapted to cut' oftat predetermined intervals a motive Huid employed for any purpose. lt-is accordingly useful in milking apparatus wherein a valve is employed for connecting and disconnecting intermittently the Vacuum or suction supply with or from teat cups.

Briey stated the mechanism comprises a compound piston valve and a double ended piston each adapted to reciprocate nr their cylinders by the alternate connnumcation at either end with suction and airsat atmospheric pressure, the compound piston valve operating the double ended piston and the latter causing a valve to reciprocate across suitable ports .connected with the motive liuid to be controlled.

T he invention is illustrated by the accompanying drawings whereofz- Figure 1 is a plan of the apparatus as applied for milking apparatus. Fig. 2 a vertical section on line IIH of Fig. 1. Fig. 3 a plan of the valve seat. Fig. 1 an underside plan of the valve. Fig. 5 a longitudinal sec` tion through the valve and its seat. Fig. 6 a vertical section on line VI-VI Fig. 5. Fig. I a horizontal section throu h the compound piston valve. Fig. 8 a simi ar view through the double ended piston cylinder, and Fig. 9 a diagrammatic View illustrating one halt` cycle of the operation of the mechanism.

lAccording to this invention there are two cylinders 1, 2, placed adjacent to each other, thelv former containing a compound' piston 3, 3, 3, 3, by which there are formed three valve chambers or recesses 4, 5, 6, in the cvlended pistonv 7, 7, having a common rod 8. The valve 9 to be controlled is removably attached by a stem 10 to the rod 8 and to provide for the reciprocatory motion of said stem 10 the cylinder of the (loable ended pis- .mey he connected ton is -preferably formed in two separated parts 2, 2, which however may be joined together provided there is a central slot, for the passage of the stem 10 of the valve. The latter has a recess 11 on its underface adapted when open to one or more pairs'of ports 12, 12, or 13, 13, in'its seating 14 to placa a pipe or pipes 15, 15, in communication with any motive Huid delivered to the ports 12, 13. For the purpose of illustration it will he assumed that suction is the motive power to be controlled. F or convenience, there is provided a vessel S having a iuid tight lid S wherein the necessary exhaustion is maintained by an air pump or other suitable suction producing device connected to the pipe @16. The valve seating 14, has a port 17 situate between the ports 12, 13, which is also in communication with the suction by means of passage 18 and on either side of port 1T the seating has ports 19,20, at opposite ends, one or the other ofwhich is open to atmospheric pressure at the limit l of the valves movement.

On each side of the recess 11 in the valve and on the underface thereof are two ports 2 1, 22, connected together by a passage 23. The valve, by means of ports 21, 22, and passage 23, alternately places the ports 19, 20, in communication with the suction through port. 17 and passage 18 in the seat ing, and alternately opens said ports 19 and 20 to the air. The ports 19, 20, are connected by crossed pipes 24, 25, with ports 26, 27 ,-in the ends of the compound piston valve cylinder 1, and said cylinder has a central port I 28 comlected by pi 29 for convenience of construction wlth this passage 18 leading to port 17 of the valve seating and consequently with the suction supply, but said pipe 29 dlrectly .with the suction supply as in Fig. 9. The cylinder is moreover provided on either side of said port 28 with one or two air inlets 30, 30, formed in the cylinder. `14urthermore said cylinder is provided between the -port 28 and air inlets 30, and 30a, with two ports 31, 32, in communication respectivel by means of ipes 33, 34, with erts 35, 6, 41n the' ends o the cylinders 2 or the double ended piston 7 7.

q'lhe central portion 37 of the 'compound pistons 3, 9, 3,23, in the cylinder l is reduced in diameter or formed with. a. groove which munication with suction and air andA thatwhen suction in communication with one enc, air is admitted at the other end. This movement reciprocates the valve 9 across either the ports l2, 12, or ports 13, 13, in its seating 1l,and by means of the recess 11 in said valve connects or disconnects either pair of said ports thus connecting or discon- .ncctiug automatically starting and stopping v at regular intervals the passage of the motive fluid through the pipes 15 and 15 which is the dcsideratum ot this invention.

teferring now to the diagrammatic view Fig. tl and assuming that it is desired to cut.

ott' suction at intervals from the pipes l5---1 e hy the valve 9 then suction in the vessel S is in communication with ports 17, 12, and 13, of the valve seating .14 and with port 28 ot the compound piston valve cylinder 1. The double ended valve T is tra vcling in the direction indicated hy arrow and is just at the limit of its stroke and the compound piston valve Sis just starting in the opposite direction. Suction iin communie tion with port 28, recess 5, port 31, pipe 53, and port 35, of the cylinder 2 and is drawing the4 piston in the direction indicated and the nioveniei'it is assisted by air entering inlets 80a, in the cylinder 1 and passing through recess 4, port 32, pi )e 34, port 3G, to the opposite end of the double ended piston 7. Suctionis in communication with port 17 in the valve seating, port 2'2, passage 23, ports 2l and 19, by Way of pipe 24 and port 26 ot' the cylinder 1, thus sticking the compound piston valve in the direction indicated, and this-movement is assisted by air at atmospheric pressure entering port 20 in the seating and passing); along pipo 25 to port 2T at the opposite end ot' the cylinder.

When the pistons are in the positions indicated, the motive fluid is in con'm'iunication with pipe 15 by ports 12, 12, but the porttis disconnected. Upon the further travel ot' the compound piston valve, the ports 28 and 32 are connected by recess 5 and the port 3G ot' the cylinder 2 is then in communication with the suc-tiep, while at the saine time the air inlet 3() connects by recess t3 with the port 3l and air delivered to port so that the motion o t the. piston T is reversed and the valve t) also. lWhen the `latter reaches the limit of its stroke 'the ports` 13, are opened hy recess 11, the port 1T is then connected with port 20 when .lie port 27 of the cylinder A1 is in coniinfnication with the suction and at the same time air enters the port 19 and is delivered by pipe to port 2G so that the piston valve is again reversed. 1

ABy the foregong it will' oe seen that the valve operates over twin ports 12, 12", and 13, 13a, in the seating, cutting 0E communi- I cation with the suction at intervalsvfrom the pipes 15, 15a, which may for instance lead to separate sets of milking cups, each pair of ports being alternately covered and uncovered by the valve when reciproeated by the double ended piston 7, and it will lbe obvious that fthe mechanism Will operate equally as Well a single pair of ports 12, 12. It will moreover be apparentthat although the ports 12, 13, of the valve seating are shown in communication with suction in the vessel S they may be connected. With-any other motive fluid by means of pipe 40 and `cylinder L11,'it being only necessary that suction is used to operate both pistons,

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be pei'- formed, I declare that What I claim is,-r

1. Suction operated valve mechanism 'compiising a compound piston valve, a cylinder for said piston valve, means for placing said cylinder in communication with suction and air at atmospheric pressure, a double ended piston adapted to operate in connection vvith said compound piston valve, a cylinder for said double ended piston adapted to be placed in communication alternately at its respective ends with suction and air from the' cylinder of the compoundvpiston valve, a valve positively connected to said double ended piston, and a. seating foi' said valve provided with a pair of ports, one of which is in constant communication with the source o1 motive lluid supply.

2. Suction operated valve mechanism comprising a compound piston valve provided with three recesses, a cylinder for said piston valve, a central port in said cylinder in communication with suction, air inlets on either side of said central port, ports hctweeii said central port and air inlets in communication by means of pipes with ports in the respective ends ot' another cylinder, a double ended piston in the latter, a reciprocating valve attached to said piston and formed with a central recess on its under face, ports in said valve. on either side of said recess, a passage connecting said ports, a. valve seating formed with air admission ports, and with a port in coinniunication with suction situated between said air ports,

tivo pairs of ports in said scating one ot each in cmmnuniwtonwith u motive hxd, cach pail' being adapted t0 he brought into com` muncn-hm by means-of the l'ecess in said fmiy'u'mifung wlw, cz'ucd pipes connecting the nil' inlet ports in Suid Valve seating w'h ports .in vthel 'cSpccive ends of the com Umm! piston vlve cylndm substmlaly as In testimony whereof I have hereunto mit my hund 111 presence of two suhgcuhmg wit- 1U uch-ses.

ALBERT m mmm. TWi tlrxesss EDWARD N. VA'FIQRS,

FREDERICK B. W-x'mns. 

